JPH0335460Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a feed bar driving device for moving a pair of feed bars closer to each other and separating them from each other, and particularly relates to one that can adjust the inner width of the feed bars.

[Background technology and its problems]

Generally, in press working, a pair of feed bars are driven by a feed bar drive device to sequentially convey a workpiece. When transporting this work, if the work is different, it is necessary to appropriately change the amount of movement of the feed bar during clamping and unclamping of the work by the feed bar, so it is necessary to adjust the inner width of the feed bar.

By the way, in conventional feed bar drive devices, the movement of a cam attached to the crankshaft of the press is transmitted as vertical movement in the axial direction to the drive rod via a swing link, and this vertical movement of the drive rod is converted into swing. Clamping and unclamping operations are performed by transmitting the signal to the feed bar via a lever gear interlocking mechanism, etc. However, in such conventional devices, the inner width adjustment of the feed bar is performed by transmitting the signal to the feed bar through a series of transmission mechanisms from the cam to the feed bar. Disconnect, manual or fluid pressure cylinder (Utility Model Application Publication No. 1986-86783), or regular brake motor (Utility Model Application Publication No. 86783)
121424), the meshing state of the gears in the gear interlocking mechanism is changed.

However, in such conventional devices, the inner width is adjusted manually or by driving a cylinder, etc., so the adjustment accuracy cannot necessarily be improved, fine adjustments are complicated, and adjustments take a long time. There is a problem with spending.

[Purpose of invention]

An object of the present invention is to provide a feed bar driving device that can accurately adjust the inner width of a feed bar in a short time.

[Means and actions for solving problems]

The present invention makes it possible to perform clamping and unclamping operations and inner width adjustment operations of the feed bar without the need to separate the series of mechanisms from the drive rod that drives the rod in the axial direction to the feed bar. It is characterized in that adjustment can be performed accurately using a pulse motor.

That is, in the present invention, a drive rod connected to a feed bar drive source is provided to be movable in the axial direction and at least a portion thereof is rotatable, and a worm portion is formed in a part of the rotatable portion of the drive rod. A worm wheel meshed with the worm portion is provided, a feed bar is connected to the worm wheel via an interlocking mechanism, and a rotation transmission means is provided which is slidable in the axial direction and capable of transmitting rotation to the rotatable portion of the drive rod. The device is equipped with a motor drive control unit that connects a pulse motor to the feed bar and rotates the pulse motor by a small amount.This allows the clamping and unclamping operations to be performed by driving the drive rod in the axial direction and moving the pair of feed bars close to each other and separating them. During this clamping and unclamping operation, the drive rod is slid in the axial direction by the rotation transmission means and does not affect the pulse motor side, while the inner width adjustment operation is performed by driving the pulse motor. The drive rod is then rotated via the rotation transmission means to adjust the dimension between the pair of feed bars (inner width adjustment).
During this adjustment, the drive rod is rotated by the rotatable part so that it does not affect the feed bar drive source side, and when adjusting the inner width, for example, one operation button is pressed on the drive control section of the pulse motor. A fine adjustment control mechanism is provided in which one shot pulse is supplied to the pulse motor when the button is pressed once. Since the connection between the feed bar side interlocking mechanism and the feed bar side interlocking mechanism is achieved by the worm portion of the drive rod and the worm wheel, the above object can be achieved by making it possible to drive the interlocking mechanism side regardless of whether the drive rod moves in the axial direction or rotates. That is.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings. This embodiment is applied to a transfer press.

FIG. 1 shows a schematic configuration of this embodiment. In FIG. 1, a lever 2 is swingably attached to a transfer press frame 1 (this refers to the main body including the bed, column, and crown), and a feed bar is attached to one end of the lever 2 via a follower 3. A cam 4 serving as a driving source is brought into contact with it, and one end of a driving rod 5 is attached to the other end. The cam 4 is connected to a crankshaft (not shown) of the press and rotated as the press is driven. As the cam 4 rotates, the drive rod 5 is moved in the axial direction via the lever 2. It is starting to be moved to The drive rod 5 consists of lower drive rods 5A and 5B which are rotatably connected at a joint 6 in the middle, and a worm portion 5C is provided in a part of the rotatable lower drive rod 5B. A worm wheel 7 is engaged with the worm portion 5C, and the worm wheel 7 is supported by a press frame or an interlocking mechanism frame (not shown) fixed to this frame.

Further, a pair of feed bars 9, 9 are connected to the worm wheel 7 via an interlocking mechanism 8. This interlocking mechanism 8 includes the worm wheel 7
an intermediate gear 10 mounted concentrically with the intermediate gear 10, a drive gear 11 meshed with the intermediate gear 10, and a screw shaft 12 to which the drive gear 11 is attached and which has a pair of threaded portions 12A, 12A wound in opposite directions at predetermined positions. and the threaded portion 12 of this threaded shaft 12
A, 12A, a pair of nut members 13, 13 that are guided along the axial direction of the screw shaft 12 by a guide (not shown), and that approach and separate from each other as the drive shaft 12 rotates forward and backward, and these nuts. Feed bar guide 1 attached to members 13, 13 and supporting the feed bars 9, 9;
4 and 14. As a result, as the drive rod 5 moves or rotates in the axial direction, the feed bars 9, 9 are brought close to and separated from each other via the worm wheel 7 and the interlocking mechanism 8. A plurality of lifters 9A are attached to opposing surfaces of each of the feed bars 9, 9, and feed bars 9, 9 are equipped with advance and return mechanisms (not shown) of the feed bars 9, 9, and lift and down mechanisms as necessary. Mechanisms are arranged in series so that the feed bars 9, 9 can carry out predetermined operations to convey the workpiece.

A clamp cylinder 15 is connected to the other end of the lower part of the drive rod 5. This clamp cylinder 15 is connected to a cylinder case 16 fixed to the frame 1, as shown in FIGS. 2 and 3.
A piston 17 attached to the other end of the lower drive rod 5B is slidably housed in the case 16. This cylinder case 1
In the lower drive rod 5B, a male spline portion 5D is formed over a predetermined length on one end side of the piston 17, that is, above the piston 17 in FIG.
A female spline portion 18A of the worm member 18 is fitted to be able to slide in the axial direction and to transmit rotation. This worm member 18 is rotatably supported by a mounting member 19, and the worm member 18 is rotatably supported by a mounting member 19.
A worm shaft 20 is rotatably attached to 9 so as to mesh with the worm member 18 . A pulse motor 22 is attached to the worm shaft 20 via a coupling 21, and when the pulse motor 22 is rotated, the drive rod 5 is rotated via the worm member 18. Here, the male spline 5D of the lower drive rod 5B, the worm member 18, the mounting member 19, the worm shaft 20, and the coupling 21 constitute a rotation transmission means 23, and this rotation transmission means 23 allows the drive rod 5 to move in the axial direction. On the other hand, the rotation of the pulse motor 22 can be transmitted to the drive rod 5. Further, the pulse motor 22 is made removable, and a handle (not shown) is attached to the coupling ring 21 in place of the pulse motor 22, and the worm shaft 20 is operated by this handle.
can be rotated manually.

A compressed air supply hole 16A is formed in the upper side of the cylinder 16 in FIG. 2, and a communication hole 19A is formed in the mounting member 19.
When compressed air is supplied from A through the tube 50 shown by the chain line, this compressed air passes through the communication hole 19A and enters the lower side of the mounting member 19, urging the piston 17 downward in FIG. The piston 17 is moved downward. As the piston 17 moves downward, the drive rod 5 is pulled downward, the lever 2 is rotated clockwise in FIG. 1, the follower 3 is brought into contact with the cam 4, and as the cam 4 rotates, The drive rod 5 is adapted to be driven up and down in the axial direction.

The pulse motor 22 is connected by a cord 24 to an operating device 25 as a motor drive control section shown in FIG. As shown in the block diagram of FIG. 4, this operation device 25 includes an operation panel section 26 having adjustment value buttons for normal use and fine adjustment buttons for forward and reverse rotation of the motor during fine adjustment, and this operation panel section. 26, and a pulse motor driver 28 that drives the pulse motor 22 at a predetermined angle in accordance with the signal from the controller 27. . Further, a commercial power source 40 is connected to the pulse motor driver 28 via a power switch 29. Here, the operation panel section 26 has a normal configuration, and can control the rotation angle of the drive rod 5 by changing the number of generated pulses, that is, control the position of the feed bars 9, and can also control the rotation speed by changing the pulse rate. It is becoming possible to do this. Further, the fine adjustment button on the operation panel 26 is configured such that when this button is pressed once, one shot pulse is emitted from the controller 27, and this button can be used for forward and reverse (increase, decrease).
For example, pressing the fine adjustment forward (increase) button once will send one shot pulse to the CW terminal of the controller 28, and pressing the fine adjustment reverse (down) button once will send one shot pulse to the CCW terminal of the controller 27. 1
A shot pulse is output, and this signal causes the pulse motor 25 to rotate by a predetermined minute angle via the driver 28.

Next, the operation of this embodiment will be explained.

First, a pair of feed bars 9, 9 clamps,
To perform the unclamping operation, compressed air is supplied to the clamp cylinder 15 to lower the piston 17, and the follower 3 is moved through the drive rod 5 and lever 2.
is brought into contact with the cam 4, and the cam 4 is rotationally driven in this state. At this time, the pulse motor 22 is not driven. When the cam 4 is rotated, the drive rod 5 is reciprocated in the axial direction via the lever 2, and along with this, the worm wheel 7 meshed with the worm portion 5D of the drive rod 5 is rotated. . By the rotation of the worm wheel 7, the screw shaft 12 of the interlocking mechanism 8 is rotated in the forward and reverse directions, and the nut members 13, 13 and the bar guide are screwed into the threaded portions 12A, 12A of the screw shaft 12 with opposite threads. 14,1
Feed bars 9 and 9 are brought close to and separated from each other via the fingers 4, and the workpiece is clamped and unclamped by the fingers 9A.

Next, in order to adjust the inner width of the feed bars 9, 9, the supply of compressed air to the clamp cylinder 15 is cut off, the rotational drive of the cam 4 is stopped, and the operation device 25 is operated to control the pulse motor 22.
drive. When the pulse motor 22 is driven, the worm shaft 20 is
is rotated, the worm member 18 is rotated, and the lower drive rod 5B is further rotated via the female spline 18A and the male spline portion 5D. As the lower drive rod 5B rotates, the worm wheel 7 meshed with the worm portion 5C is also rotated, and as a result, the feed bars 9, 9 are brought close to or separated from each other via the interlocking mechanism 8, and the inner width is adjusted. .

In driving the pulse motor 22, normally,
Since the relationship between the rotation angle of the pulse motor 22 and the amount of movement of the pair of feed bars 9, 9 has been measured in advance, a value corresponding to the necessary inner width adjustment amount of the feed bars 9, 9 is determined based on this measured value. is set using the adjustment value button on the operation panel section 26 to roughly adjust the inner width, and then adjust the actual feed bar 9, 9.
Make fine adjustments by operating the fine adjustment forward and reverse buttons while measuring the amount of movement. For this fine adjustment,
When the fine adjustment button is pressed once, one shot of pulse is output from the programmable controller 27.
The pulse motor 22 is slightly rotated via the pulse motor driver 28. Therefore, by repeating the press of the fine amount adjustment button a plurality of times, the inner width of the feed bars 9, 9 can be adjusted in small amounts by this number of times. At this time, the amount of one minute movement of the feed bars 9, 9 can be adjusted to, for example, 0.1 to 1.0 mm. Further, the speed of the pulse motor 22 is adjusted by operating the operation panel section 26 and changing the pulse rate.

According to this embodiment, the pulse motor 2
2 is used to adjust the inner width of the feed bars 9, 9, the adjustment work is not as complicated as in the prior art, and the adjustment work can be performed accurately and in a short time. In addition, by using the fine adjustment button, the feed bar 9,
Since the finger 9 can be moved and accurate inner width adjustment can be performed, the adjustment of the finger 9A during mold adjustment of the transfer press can be performed in an extremely short time compared to the conventional method. In addition, accurate inner width adjustment allows stable conveyance of workpieces. Further, in transmitting the rotation of the pulse motor 22 to the drive rod 5, the drive rod 5 can be slid in the axial direction, and
Since the rotation transmission means 23 capable of transmitting rotation is used,
The clamping, unclamping, and inner width adjusting operations of the feed bars 9 can be performed without using any means for disconnecting the mechanisms of each part, and the structure and operation of the apparatus can be simplified. Further, since the follower 3 is brought into contact with the cam 4 using the pneumatically operated clamp cylinder 15, the rotation of the cam 4 can be made to correspond accurately to the reciprocating motion of the drive rod 5, and the feed bars 9, 9 Clamping and unclamping operations can be performed reliably.

In addition, in the embodiment, the rotation transmission means 23 is
Although the worm shaft 20 is configured to mesh with the worm portion 18 spline-coupled to the drive rod 5, the present invention is not limited to the configuration of the above embodiment, and the worm shaft 20 is capable of sliding in the axial direction with respect to the drive rod 5 and has a pulse motor. Any other means may be used as long as the rotation from 22 can be transmitted to the drive rod 5. for example,
Instead of the worm member 18 and the worm shaft 20, a first gear is attached to the drive rod 5 through a spline portion so as to be slidable in the axial direction, and a first gear is meshed with the first gear and is connected to the pulse motor 22. It may also be configured using two gears. Further, in order to allow the drive rod 5 and the worm member 18 to slide in the axial direction, female and male spline portions 18 are provided.
Instead of forming A, 5D, a key or a keyway may be formed. Further, in order to urge the drive rod 5 downward, the method is not limited to supplying air to the clamp cylinder 15 as in the above embodiment, but means such as a spring may be used. However, if the clamp cylinder 15 is used, the pressure is stable and the urging force can be easily released. In addition, in this embodiment, the lower drive rod 5
In order to make B freely rotatable, the upper and lower drive rods 5
Although the joint 6 is provided in the middle of the upper drive rod 5A and the lever 2, it may be used to connect the attachment part of the upper drive rod 5A and the lever 2 so that the upper drive rod 5A can rotate. Rod 5 does not need to be divided into upper and lower parts. In addition, in the present invention, the interlocking mechanism 8 is not limited to the configuration shown in FIG. 1, but as shown in FIG.
A pair of carts 30, 30 equipped with 4 are provided with first racks 30, 30 whose tooth surfaces face each other, and a first pinion 32 is meshed between these first racks 31, 31. 2nd pinion 3
3 are attached concentrically, a second rack 34 is meshed with the second pinion 33, and the second rack 34 is further meshed with the intermediate gear 10 connected to the worm 7 of the above embodiment. Furthermore, the feed bar driving source is not limited to the cam 4 connected to the crankshaft of the press, but may be an independent motor or the like. Further, in the above embodiments, the present invention is applied to a transfer press, but the present invention is not limited to this, but can also be applied to a device that has a plurality of single presses and drives a feed bar stretched between these presses.

[Effects of the Invention] As described above, according to the present invention, the inner width of the feed bar can be adjusted accurately and in a short time.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of an embodiment according to the present invention,
2 is an enlarged sectional view of the rotation transmitting means of the embodiment, FIG. 3 is a sectional view taken along the line - in FIG. 2, FIG. 4 is a block diagram of the operating device of the embodiment, and FIG.
It is a schematic block diagram of another example of a figure interlocking mechanism. 1... Frame, 5... Drive rod, 5A...
Upper drive rod, 5B...Lower drive rod, 5C
...Warm part, 5D...Male spline part, 6...
...Joint, 7...Worm wheel, 8...
Interlocking mechanism, 9... Feed bar, 9A... Finger, 15... Clamp cylinder, 18... Worm member, 18A... Female spline section, 20... Worm shaft, 22... Pulse motor, 23...
...Rotation transmission means, 25... Operating device as a motor drive control section.

Claims (1)

[Scope of utility model registration request] In a feed bar drive device for moving a pair of feed bars close to each other and separating them from each other, a drive rod connected to a feed bar drive source is provided to be movable in the axial direction and at least a portion of the drive rod is rotatable. A worm portion is formed, and a worm wheel meshed with the worm portion is provided, and a feed bar is connected to the worm wheel via an interlocking mechanism, and is capable of sliding in the axial direction and transmitting rotation to the rotatable portion of the drive rod. 1. A feed bar drive device, characterized in that a pulse motor is connected to the pulse motor via a possible rotation transmission means, and is provided with a motor drive control section that rotates the pulse motor by a small amount.